v3.26.1
Regulatory Matters - Schedule of Capital Amounts and Ratios for Bank (Details)
$ in Thousands
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Actual Capital, Amount    
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Capital, Amount $ 347,622 $ 344,979
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer 203,353 203,425
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions 188,828 188,895
Tier One Risk Based Capital, Amount    
Tier I Capital to Risk-Weighted Assets, Actual Capital, Amount 347,622 344,979
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital Adequacy plus Capital Conservation Buffer 246,928 247,017
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions 232,403 232,486
Capital, Amount    
Total Capital to Risk-Weighted Assets, Actual Capital, Amount 377,617 376,171
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer 305,029 305,138
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions 290,504 290,608
Tier One Leverage Capital, Amount    
Tier I Capital to Average Assets, Actual Capital, Amount 347,622 344,979
Tier I Capital to Average Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer 134,761 130,725
Tier I Capital to Average Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions $ 168,451 $ 163,406
Actual Capital, Ratio    
Common Equity Tier One Capital Ratio 0.1197 0.1187
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.070 0.0700
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.0650 0.0650
Tier I Capital to Risk-Weighted Assets, Actual Capital, Ratio 0.1197 0.1187
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.085 0.0850
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions with Buffer, Ratio 8.00% 8.00%
Total Capital to Risk-Weighted Assets, Actual Capital, Ratio 0.1300 0.1294
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.1050 0.1050
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.1000 0.1000
Tier I Capital to Average Assets, Actual Capital, Ratio 0.1032 0.1056
Tier I Capital to Average Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.0400 0.0400
Tier I Capital to Average Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.0500 0.0500
Bankwell Financial Group Inc    
Actual Capital, Amount    
Common Equity Tier 1 Capital to Risk-Weighted Assets, Actual Capital, Amount $ 308,447 $ 298,121
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer 131,086 131,112
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions 189,346 189,385
Tier One Risk Based Capital, Amount    
Tier I Capital to Risk-Weighted Assets, Actual Capital, Amount 308,447 298,121
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital Adequacy plus Capital Conservation Buffer 174,781 174,816
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Actions Provisions 233,041 233,089
Capital, Amount    
Total Capital to Risk-Weighted Assets, Actual Capital, Amount 408,201 399,010
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer 233,041 233,089
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions 291,302 291,361
Tier One Leverage Capital, Amount    
Tier I Capital to Average Assets, Actual Capital, Amount 308,447 298,121
Tier I Capital to Average Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer 135,101 130,961
Tier I Capital to Average Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions $ 168,876 $ 163,701
Actual Capital, Ratio    
Common Equity Tier One Capital Ratio 0.1059 0.1023
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.0450 0.0450
Common Equity Tier 1 Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.0650 0.0650
Tier I Capital to Risk-Weighted Assets, Actual Capital, Ratio 0.1059 0.1023
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.0600 0.0600
Tier I Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.0800 0.0800
Total Capital to Risk-Weighted Assets, Actual Capital, Ratio 0.1401 0.1369
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.0800 0.0800
Total Capital to Risk-Weighted Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.1000 0.1000
Tier I Capital to Average Assets, Actual Capital, Ratio 0.0913 0.0911
Tier I Capital to Average Assets, Minimum Regulatory Capital Required for Capital Adequacy plus Capital Conservation Buffer, Ratio 0.0400 0.0400
Tier I Capital to Average Assets, Minimum Regulatory Capital to be Well Capitalized Under Prompt Corrective Action Provisions, Ratio 0.0500 0.0500